"use strict";
let arr1 = ["abc"]; //相当于 let arr1:string[] = ["abc"];
let arr2 = [123]; //相当于 let arr2:number[] = [123];
let arr3 = ["abc", 123, true]; //相当于 let arr1:(string | number | boolean)[] = ["abc",123,true];
arr3.push('bcd', 534, false);
console.log(arr3);
